Shure PS9 Quick Start Manual page 4

To use a 9V battery in place of the PS9:
1. Turn off the bodypack.
2. Disconnect the PS42 from the PS9 threaded DC connector.
3. Open the flexible door and remove the PS9.
4. Insert the 9V battery, observing proper polarity.
5. Flip the rubber plug shut and close the door.
Figure 2
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